Thames At Night with Tony Robinson

Tony explores the stretch of the Thames from the estuary, where the river meets the sea, to the Thames Barrier. It's here, at the Barrier itself, where he begins his journey, as he's given a unique invitation to its control room.

Tony starts his journey in Greenwich, with behind-the-scenes access to the Royal Observatory. He discovers the role the observatory played in helping sailors navigate the globe.

Tony reveals how the Thames plays a vital role in keeping London, and beyond, on the move, and how it's a 24/7 operation.

On the West London stretch of the Thames, Tony discovers how night-shift workers contend with the river's tides. He also joins the fire service based at Lambeth, which specialises in dealing with emergencies on the river.